/*
* Copyright(C) 2011-2012 Alibaba Group Holding Limited
* 
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/


/*
 * libev native API header
 *
 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 *
 *   1.  Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *
 *   2.  Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License ("GPL") version 2 or any later version,
 * in which case the provisions of the GPL are applicable instead of
 * the above. If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the BSD license, indicate your decision
 * by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL. If you do not delete the
 * provisions above, a recipient may use your version of this file under
 * either the BSD or the GPL.
 */

#ifndef EV_H_
#define EV_H_

#ifdef __cplusplus
# define EV_CPP(x) x
#else
# define EV_CPP(x)
#endif

EV_CPP(extern "C" {
          )

    /*****************************************************************************/

    /* pre-4.0 compatibility */
#ifndef EV_COMPAT3
# define EV_COMPAT3 1
#endif

#ifndef EV_FEATURES
# define EV_FEATURES 0x7f
#endif

#define EV_FEATURE_CODE     ((EV_FEATURES) &  1)
#define EV_FEATURE_DATA     ((EV_FEATURES) &  2)
#define EV_FEATURE_CONFIG   ((EV_FEATURES) &  4)
#define EV_FEATURE_API      ((EV_FEATURES) &  8)
#define EV_FEATURE_WATCHERS ((EV_FEATURES) & 16)
#define EV_FEATURE_BACKENDS ((EV_FEATURES) & 32)
#define EV_FEATURE_OS       ((EV_FEATURES) & 64)

    /* these priorities are inclusive, higher priorities will be invoked earlier */
#ifndef EV_MINPRI
# define EV_MINPRI (EV_FEATURE_CONFIG ? -2 : 0)
#endif
#ifndef EV_MAXPRI
# define EV_MAXPRI (EV_FEATURE_CONFIG ? +2 : 0)
#endif

#ifndef EV_MULTIPLICITY
# define EV_MULTIPLICITY EV_FEATURE_CONFIG
#endif

#ifndef EV_PERIODIC_ENABLE
# define EV_PERIODIC_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_STAT_ENABLE
# define EV_STAT_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_PREPARE_ENABLE
# define EV_PREPARE_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_CHECK_ENABLE
# define EV_CHECK_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_IDLE_ENABLE
# define EV_IDLE_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_FORK_ENABLE
# define EV_FORK_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_CLEANUP_ENABLE
# define EV_CLEANUP_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_SIGNAL_ENABLE
# define EV_SIGNAL_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_CHILD_ENABLE
# ifdef _WIN32
#  define EV_CHILD_ENABLE 0
# else
#  define EV_CHILD_ENABLE EV_FEATURE_WATCHERS
#endif
#endif

#ifndef EV_ASYNC_ENABLE
# define EV_ASYNC_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_EMBED_ENABLE
# define EV_EMBED_ENABLE EV_FEATURE_WATCHERS
#endif

#ifndef EV_WALK_ENABLE
# define EV_WALK_ENABLE 0 /* not yet */
#endif

    /*****************************************************************************/

#if EV_CHILD_ENABLE && !EV_SIGNAL_ENABLE
# undef EV_SIGNAL_ENABLE
# define EV_SIGNAL_ENABLE 1
#endif

    /*****************************************************************************/

    typedef double ev_tstamp;

#ifndef EV_ATOMIC_T
# include <signal.h>
# define EV_ATOMIC_T sig_atomic_t volatile
#endif

#if EV_STAT_ENABLE
# ifdef _WIN32
#  include <time.h>
#  include <sys/types.h>
# endif
# include <sys/stat.h>
#endif

    /* support multiple event loops? */
#if EV_MULTIPLICITY
    struct ev_loop;
# define EV_P  struct ev_loop *loop               /* a loop as sole parameter in a declaration */
# define EV_P_ EV_P,                              /* a loop as first of multiple parameters */
# define EV_A  loop                               /* a loop as sole argument to a function call */
# define EV_A_ EV_A,                              /* a loop as first of multiple arguments */
# define EV_DEFAULT_UC  ev_default_loop_uc_ ()    /* the default loop, if initialised, as sole arg */
# define EV_DEFAULT_UC_ EV_DEFAULT_UC,            /* the default loop as first of multiple arguments */
# define EV_DEFAULT  ev_default_loop (0)          /* the default loop as sole arg */
# define EV_DEFAULT_ EV_DEFAULT,                  /* the default loop as first of multiple arguments */
#else
# define EV_P void
# define EV_P_
# define EV_A
# define EV_A_
# define EV_DEFAULT
# define EV_DEFAULT_
# define EV_DEFAULT_UC
# define EV_DEFAULT_UC_
# undef EV_EMBED_ENABLE
#endif

    /* EV_INLINE is used for functions in header files */
#if __STDC_VERSION__ >= 199901L || __GNUC__ >= 3
# define EV_INLINE static inline
#else
# define EV_INLINE static
#endif

    /* EV_PROTOTYPES can be sued to switch of prototype declarations */
#ifndef EV_PROTOTYPES
# define EV_PROTOTYPES 1
#endif

    /*****************************************************************************/

#define EV_VERSION_MAJOR 4
#define EV_VERSION_MINOR 1

    /* eventmask, revents, events... */
            enum {
        EV_UNDEF    = 0xFFFFFFFF, /* guaranteed to be invalid */
        EV_NONE     =       0x00, /* no events */
        EV_READ     =       0x01, /* ev_io detected read will not block */
        EV_WRITE    =       0x02, /* ev_io detected write will not block */
        EV__IOFDSET =       0x80, /* internal use only */
        EV_IO       =    EV_READ, /* alias for type-detection */
        EV_TIMER    = 0x00000100, /* timer timed out */
#if EV_COMPAT3
        EV_TIMEOUT  =   EV_TIMER, /* pre 4.0 API compatibility */
#endif
        EV_PERIODIC = 0x00000200, /* periodic timer timed out */
        EV_SIGNAL   = 0x00000400, /* signal was received */
        EV_CHILD    = 0x00000800, /* child/pid had status change */
        EV_STAT     = 0x00001000, /* stat data changed */
        EV_IDLE     = 0x00002000, /* event loop is idling */
        EV_PREPARE  = 0x00004000, /* event loop about to poll */
        EV_CHECK    = 0x00008000, /* event loop finished poll */
        EV_EMBED    = 0x00010000, /* embedded event loop needs sweep */
        EV_FORK     = 0x00020000, /* event loop resumed in child */
        EV_CLEANUP  = 0x00040000, /* event loop resumed in child */
        EV_ASYNC    = 0x00080000, /* async intra-loop signal */
        EV_CUSTOM   = 0x01000000, /* for use by user code */
        EV_ERROR    = 0x80000000  /* sent when an error occurs */
    };

    /* can be used to add custom fields to all watchers, while losing binary compatibility */
#ifndef EV_COMMON
# define EV_COMMON void *data;
#endif

#ifndef EV_CB_DECLARE
# define EV_CB_DECLARE(type) void (*cb)(EV_P_ struct type *w, int revents);
#endif
#ifndef EV_CB_INVOKE
# define EV_CB_INVOKE(watcher,revents) (watcher)->cb (EV_A_ (watcher), (revents))
#endif

    /* not official, do not use */
#define EV_CB(type,name) void name (EV_P_ struct ev_ ## type *w, int revents)

    /*
     * struct member types:
     * private: you may look at them, but not change them,
     *          and they might not mean anything to you.
     * ro: can be read anytime, but only changed when the watcher isn't active.
     * rw: can be read and modified anytime, even when the watcher is active.
     *
     * some internal details that might be helpful for debugging:
     *
     * active is either 0, which means the watcher is not active,
     *           or the array index of the watcher (periodics, timers)
     *           or the array index + 1 (most other watchers)
     *           or simply 1 for watchers that aren't in some array.
     * pending is either 0, in which case the watcher isn't,
     *           or the array index + 1 in the pendings array.
     */

#if EV_MINPRI == EV_MAXPRI
# define EV_DECL_PRIORITY
#elif !defined (EV_DECL_PRIORITY)
# define EV_DECL_PRIORITY int priority;
#endif

    /* shared by all watchers */
#define EV_WATCHER(type)            \
    int active; /* private */         \
    int pending; /* private */            \
    EV_DECL_PRIORITY /* private */        \
    EV_COMMON /* rw */                \
    EV_CB_DECLARE (type) /* private */

#define EV_WATCHER_LIST(type)           \
    EV_WATCHER (type)             \
    struct ev_watcher_list *next; /* private */

#define EV_WATCHER_TIME(type)           \
    EV_WATCHER (type)             \
    ev_tstamp at;     /* private */

    /* base class, nothing to see here unless you subclass */
    typedef struct ev_watcher {
        EV_WATCHER (ev_watcher)
    } ev_watcher;

    /* base class, nothing to see here unless you subclass */
    typedef struct ev_watcher_list {
        EV_WATCHER_LIST (ev_watcher_list)
    } ev_watcher_list;

    /* base class, nothing to see here unless you subclass */
    typedef struct ev_watcher_time {
        EV_WATCHER_TIME (ev_watcher_time)
    } ev_watcher_time;

    /* invoked when fd is either EV_READable or EV_WRITEable */
    /* revent EV_READ, EV_WRITE */
    typedef struct ev_io {
        EV_WATCHER_LIST (ev_io)

        int fd;     /* ro */
        int events; /* ro */
    } ev_io;

    /* invoked after a specific time, repeatable (based on monotonic clock) */
    /* revent EV_TIMEOUT */
    typedef struct ev_timer {
        EV_WATCHER_TIME (ev_timer)

        ev_tstamp repeat; /* rw */
    } ev_timer;

    /* invoked at some specific time, possibly repeating at regular intervals (based on UTC) */
    /* revent EV_PERIODIC */
    typedef struct ev_periodic {
        EV_WATCHER_TIME (ev_periodic)

        ev_tstamp offset; /* rw */
        ev_tstamp interval; /* rw */
        ev_tstamp ( *reschedule_cb)(struct ev_periodic *w, ev_tstamp now); /* rw */
    } ev_periodic;

    /* invoked when the given signal has been received */
    /* revent EV_SIGNAL */
    typedef struct ev_signal {
        EV_WATCHER_LIST (ev_signal)

        int signum; /* ro */
    } ev_signal;

    /* invoked when sigchld is received and waitpid indicates the given pid */
    /* revent EV_CHILD */
    /* does not support priorities */
    typedef struct ev_child {
        EV_WATCHER_LIST (ev_child)

        int flags;   /* private */
        int pid;     /* ro */
        int rpid;    /* rw, holds the received pid */
        int rstatus; /* rw, holds the exit status, use the macros from sys/wait.h */
    } ev_child;

#if EV_STAT_ENABLE
    /* st_nlink = 0 means missing file or other error */
# ifdef _WIN32
    typedef struct _stati64 ev_statdata;
# else
    typedef struct stat ev_statdata;
# endif

    /* invoked each time the stat data changes for a given path */
    /* revent EV_STAT */
            typedef struct ev_stat {
            EV_WATCHER_LIST (ev_stat)

            ev_timer timer;     /* private */
            ev_tstamp interval; /* ro */
            const char *path;   /* ro */
            ev_statdata prev;   /* ro */
            ev_statdata attr;   /* ro */

            int wd; /* wd for inotify, fd for kqueue */
        } ev_stat;
#endif

#if EV_IDLE_ENABLE
    /* invoked when the nothing else needs to be done, keeps the process from blocking */
    /* revent EV_IDLE */
    typedef struct ev_idle {
        EV_WATCHER (ev_idle)
    } ev_idle;
#endif

    /* invoked for each run of the mainloop, just before the blocking call */
    /* you can still change events in any way you like */
    /* revent EV_PREPARE */
    typedef struct ev_prepare {
        EV_WATCHER (ev_prepare)
    } ev_prepare;

    /* invoked for each run of the mainloop, just after the blocking call */
    /* revent EV_CHECK */
    typedef struct ev_check {
        EV_WATCHER (ev_check)
    } ev_check;

#if EV_FORK_ENABLE
    /* the callback gets invoked before check in the child process when a fork was detected */
    /* revent EV_FORK */
    typedef struct ev_fork {
        EV_WATCHER (ev_fork)
    } ev_fork;
#endif

#if EV_CLEANUP_ENABLE
    /* is invoked just before the loop gets destroyed */
    /* revent EV_CLEANUP */
    typedef struct ev_cleanup {
        EV_WATCHER (ev_cleanup)
    } ev_cleanup;
#endif

#if EV_EMBED_ENABLE
    /* used to embed an event loop inside another */
    /* the callback gets invoked when the event loop has handled events, and can be 0 */
    typedef struct ev_embed {
        EV_WATCHER (ev_embed)

        struct ev_loop *other; /* ro */
        ev_io io;              /* private */
        ev_prepare prepare;    /* private */
        ev_check check;        /* unused */
        ev_timer timer;        /* unused */
        ev_periodic periodic;  /* unused */
        ev_idle idle;          /* unused */
        ev_fork fork;          /* private */
#if EV_CLEANUP_ENABLE
        ev_cleanup cleanup;    /* unused */
#endif
    } ev_embed;
#endif

#if EV_ASYNC_ENABLE
    /* invoked when somebody calls ev_async_send on the watcher */
    /* revent EV_ASYNC */
    typedef struct ev_async {
        EV_WATCHER (ev_async)

        EV_ATOMIC_T sent; /* private */
    } ev_async;

# define ev_async_pending(w) (+(w)->sent)
#endif

    /* the presence of this union forces similar struct layout */
    union ev_any_watcher {
        struct ev_watcher w;
        struct ev_watcher_list wl;

        struct ev_io io;
        struct ev_timer timer;
        struct ev_periodic periodic;
        struct ev_signal signal;
        struct ev_child child;
#if EV_STAT_ENABLE
        struct ev_stat stat;
#endif
#if EV_IDLE_ENABLE
        struct ev_idle idle;
#endif
        struct ev_prepare prepare;
        struct ev_check check;
#if EV_FORK_ENABLE
        struct ev_fork fork;
#endif
#if EV_CLEANUP_ENABLE
        struct ev_cleanup cleanup;
#endif
#if EV_EMBED_ENABLE
        struct ev_embed embed;
#endif
#if EV_ASYNC_ENABLE
        struct ev_async async;
#endif
    };

    /* flag bits for ev_default_loop and ev_loop_new */
    enum {
        /* the default */
        EVFLAG_AUTO      = 0x00000000U, /* not quite a mask */
        /* flag bits */
        EVFLAG_NOENV     = 0x01000000U, /* do NOT consult environment */
        EVFLAG_FORKCHECK = 0x02000000U, /* check for a fork in each iteration */
        /* debugging/feature disable */
        EVFLAG_NOINOTIFY = 0x00100000U, /* do not attempt to use inotify */
#if EV_COMPAT3
        EVFLAG_NOSIGFD   = 0, /* compatibility to pre-3.9 */
#endif
        EVFLAG_SIGNALFD  = 0x00200000U  /* attempt to use signalfd */
    };

    /* method bits to be ored together */
    enum {
        EVBACKEND_SELECT  = 0x00000001U, /* about anywhere */
        EVBACKEND_POLL    = 0x00000002U, /* !win */
        EVBACKEND_EPOLL   = 0x00000004U, /* linux */
        EVBACKEND_KQUEUE  = 0x00000008U, /* bsd */
        EVBACKEND_DEVPOLL = 0x00000010U, /* solaris 8 */ /* NYI */
                            EVBACKEND_PORT    = 0x00000020U, /* solaris 10 */
                            EVBACKEND_ALL     = 0x0000003FU
    };

#if EV_PROTOTYPES
    int ev_version_major (void);
    int ev_version_minor (void);

    unsigned int ev_supported_backends (void);
    unsigned int ev_recommended_backends (void);
    unsigned int ev_embeddable_backends (void);

    ev_tstamp ev_time (void);
    void ev_sleep (ev_tstamp delay); /* sleep for a while */

    /* Sets the allocation function to use, works like realloc.
     * It is used to allocate and free memory.
     * If it returns zero when memory needs to be allocated, the library might abort
     * or take some potentially destructive action.
     * The default is your system realloc function.
     */
    void ev_set_allocator (void *(*cb)(void *ptr, size_t size));

    /* set the callback function to call on a
     * retryable syscall error
     * (such as failed select, poll, epoll_wait)
     */
    void ev_set_syserr_cb (void (*cb)(const char *msg));

#if EV_MULTIPLICITY

    /* the default loop is the only one that handles signals and child watchers */
    /* you can call this as often as you like */
    struct ev_loop *ev_default_loop (unsigned int flags EV_CPP ( = 0));

    EV_INLINE struct ev_loop *
    ev_default_loop_uc_ (void)
    {
        extern struct ev_loop *ev_default_loop_ptr;

        return ev_default_loop_ptr;
    }

    EV_INLINE int
    ev_is_default_loop (EV_P)
    {
        return EV_A == EV_DEFAULT_UC;
    }

    /* create and destroy alternative loops that don't handle signals */
    struct ev_loop *ev_loop_new (unsigned int flags EV_CPP ( = 0));

    ev_tstamp ev_now (EV_P); /* time w.r.t. timers and the eventloop, updated after each poll */

#else

    int ev_default_loop (unsigned int flags EV_CPP ( = 0)); /* returns true when successful */

    EV_INLINE ev_tstamp
    ev_now (void)
    {
        extern ev_tstamp ev_rt_now;

        return ev_rt_now;
    }

    /* looks weird, but ev_is_default_loop (EV_A) still works if this exists */
    EV_INLINE int
    ev_is_default_loop (void)
    {
        return 1;
    }

#endif /* multiplicity */

    /* destroy event loops, also works for the default loop */
    void ev_loop_destroy (EV_P);

    /* this needs to be called after fork, to duplicate the loop */
    /* when you want to re-use it in the child */
    /* you can call it in either the parent or the child */
    /* you can actually call it at any time, anywhere :) */
    void ev_loop_fork (EV_P);

    unsigned int ev_backend (EV_P); /* backend in use by loop */

    void ev_now_update (EV_P); /* update event loop time */

#if EV_WALK_ENABLE
    /* walk (almost) all watchers in the loop of a given type, invoking the */
    /* callback on every such watcher. The callback might stop the watcher, */
    /* but do nothing else with the loop */
    void ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w));
#endif

#endif /* prototypes */

    /* ev_run flags values */
    enum {
        EVRUN_NOWAIT = 1, /* do not block/wait */
        EVRUN_ONCE   = 2  /* block *once* only */
    };

    /* ev_break how values */
    enum {
        EVBREAK_CANCEL = 0, /* undo unloop */
        EVBREAK_ONE    = 1, /* unloop once */
        EVBREAK_ALL    = 2  /* unloop all loops */
    };

#if EV_PROTOTYPES
    void ev_run (EV_P_ int flags EV_CPP ( = 0));
    void ev_break (EV_P_ int how EV_CPP ( = EVBREAK_ONE)); /* break out of the loop */

    /*
     * ref/unref can be used to add or remove a refcount on the mainloop. every watcher
     * keeps one reference. if you have a long-running watcher you never unregister that
     * should not keep ev_loop from running, unref() after starting, and ref() before stopping.
     */
    void ev_ref   (EV_P);
    void ev_unref (EV_P);

    /*
     * convenience function, wait for a single event, without registering an event watcher
     * if timeout is < 0, do wait indefinitely
     */
    void ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg);

# if EV_FEATURE_API
    unsigned int ev_iteration (EV_P); /* number of loop iterations */
    unsigned int ev_depth     (EV_P); /* #ev_loop enters - #ev_loop leaves */
    void         ev_verify    (EV_P); /* abort if loop data corrupted */

    void ev_set_io_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */
    void ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval); /* sleep at least this time, default 0 */

    /* advanced stuff for threading etc. support, see docs */
    void ev_set_userdata (EV_P_ void *data);
    void *ev_userdata (EV_P);
    void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P));
    void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P));

    unsigned int ev_pending_count (EV_P); /* number of pending events, if any */
    void ev_invoke_pending (EV_P); /* invoke all pending watchers */

    /*
     * stop/start the timer handling.
     */
    void ev_suspend (EV_P);
    void ev_resume  (EV_P);
#endif

#endif

    /* these may evaluate ev multiple times, and the other arguments at most once */
    /* either use ev_init + ev_TYPE_set, or the ev_TYPE_init macro, below, to first initialise a watcher */
#define ev_init(ev,cb_) do {            \
        ((ev_watcher *)(void *)(ev))->active  =   \
                ((ev_watcher *)(void *)(ev))->pending = 0;    \
        ev_set_priority ((ev), 0);            \
        ev_set_cb ((ev), cb_);            \
    } while (0)

#define ev_io_set(ev,fd_,events_)            do { (ev)->fd = (fd_); (ev)->events = (events_) | EV__IOFDSET; } while (0)
#define ev_timer_set(ev,after_,repeat_)      do { (ev)->at = (after_); (ev)->repeat = (repeat_); } while (0)
#define ev_periodic_set(ev,ofs_,ival_,rcb_)  do { (ev)->offset = (ofs_); (ev)->interval = (ival_); (ev)->reschedule_cb = (rcb_); } while (0)
#define ev_signal_set(ev,signum_)            do { (ev)->signum = (signum_); } while (0)
#define ev_child_set(ev,pid_,trace_)         do { (ev)->pid = (pid_); (ev)->flags = !!(trace_); } while (0)
#define ev_stat_set(ev,path_,interval_)      do { (ev)->path = (path_); (ev)->interval = (interval_); (ev)->wd = -2; } while (0)
#define ev_idle_set(ev)                      /* nop, yes, this is a serious in-joke */
#define ev_prepare_set(ev)                   /* nop, yes, this is a serious in-joke */
#define ev_check_set(ev)                     /* nop, yes, this is a serious in-joke */
#define ev_embed_set(ev,other_)              do { (ev)->other = (other_); } while (0)
#define ev_fork_set(ev)                      /* nop, yes, this is a serious in-joke */
#define ev_cleanup_set(ev)                   /* nop, yes, this is a serious in-joke */
#define ev_async_set(ev)                     /* nop, yes, this is a serious in-joke */

#define ev_io_init(ev,cb,fd,events)          do { ev_init ((ev), (cb)); ev_io_set ((ev),(fd),(events)); } while (0)
#define ev_timer_init(ev,cb,after,repeat)    do { ev_init ((ev), (cb)); ev_timer_set ((ev),(after),(repeat)); } while (0)
#define ev_periodic_init(ev,cb,ofs,ival,rcb) do { ev_init ((ev), (cb)); ev_periodic_set ((ev),(ofs),(ival),(rcb)); } while (0)
#define ev_signal_init(ev,cb,signum)         do { ev_init ((ev), (cb)); ev_signal_set ((ev), (signum)); } while (0)
#define ev_child_init(ev,cb,pid,trace)       do { ev_init ((ev), (cb)); ev_child_set ((ev),(pid),(trace)); } while (0)
#define ev_stat_init(ev,cb,path,interval)    do { ev_init ((ev), (cb)); ev_stat_set ((ev),(path),(interval)); } while (0)
#define ev_idle_init(ev,cb)                  do { ev_init ((ev), (cb)); ev_idle_set ((ev)); } while (0)
#define ev_prepare_init(ev,cb)               do { ev_init ((ev), (cb)); ev_prepare_set ((ev)); } while (0)
#define ev_check_init(ev,cb)                 do { ev_init ((ev), (cb)); ev_check_set ((ev)); } while (0)
#define ev_embed_init(ev,cb,other)           do { ev_init ((ev), (cb)); ev_embed_set ((ev),(other)); } while (0)
#define ev_fork_init(ev,cb)                  do { ev_init ((ev), (cb)); ev_fork_set ((ev)); } while (0)
#define ev_cleanup_init(ev,cb)               do { ev_init ((ev), (cb)); ev_cleanup_set ((ev)); } while (0)
#define ev_async_init(ev,cb)                 do { ev_init ((ev), (cb)); ev_async_set ((ev)); } while (0)

#define ev_is_pending(ev)                    (0 + ((ev_watcher *)(void *)(ev))->pending) /* ro, true when watcher is waiting for callback invocation */
#define ev_is_active(ev)                     (0 + ((ev_watcher *)(void *)(ev))->active) /* ro, true when the watcher has been started */

#define ev_cb(ev)                            (ev)->cb /* rw */

#if EV_MINPRI == EV_MAXPRI
# define ev_priority(ev)                     ((ev), EV_MINPRI)
# define ev_set_priority(ev,pri)             ((ev), (pri))
#else
# define ev_priority(ev)                     (+(((ev_watcher *)(void *)(ev))->priority))
# define ev_set_priority(ev,pri)             (   (ev_watcher *)(void *)(ev))->priority = (pri)
#endif

#define ev_periodic_at(ev)                   (+((ev_watcher_time *)(ev))->at)

#ifndef ev_set_cb
# define ev_set_cb(ev,cb_)                   ev_cb (ev) = (cb_)
#endif

    /* stopping (enabling, adding) a watcher does nothing if it is already running */
    /* stopping (disabling, deleting) a watcher does nothing unless its already running */
#if EV_PROTOTYPES

    /* feeds an event into a watcher as if the event actually occured */
    /* accepts any ev_watcher type */
    void ev_feed_event     (EV_P_ void *w, int revents);
    void ev_feed_fd_event  (EV_P_ int fd, int revents);
#if EV_SIGNAL_ENABLE
    void ev_feed_signal_event (EV_P_ int signum);
#endif
    void ev_invoke         (EV_P_ void *w, int revents);
    int  ev_clear_pending  (EV_P_ void *w);

    void ev_io_start       (EV_P_ ev_io *w);
    void ev_io_stop        (EV_P_ ev_io *w);
    void ev_io_ctrl_del    (EV_P_ ev_io *w);

    void ev_timer_start    (EV_P_ ev_timer *w);
    void ev_timer_stop     (EV_P_ ev_timer *w);
    /* stops if active and no repeat, restarts if active and repeating, starts if inactive and repeating */
    void ev_timer_again    (EV_P_ ev_timer *w);
    /* return remaining time */
    ev_tstamp ev_timer_remaining (EV_P_ ev_timer *w);

#if EV_PERIODIC_ENABLE
    void ev_periodic_start (EV_P_ ev_periodic *w);
    void ev_periodic_stop  (EV_P_ ev_periodic *w);
    void ev_periodic_again (EV_P_ ev_periodic *w);
#endif

    /* only supported in the default loop */
#if EV_SIGNAL_ENABLE
    void ev_signal_start   (EV_P_ ev_signal *w);
    void ev_signal_stop    (EV_P_ ev_signal *w);
#endif

    /* only supported in the default loop */
# if EV_CHILD_ENABLE
    void ev_child_start    (EV_P_ ev_child *w);
    void ev_child_stop     (EV_P_ ev_child *w);
# endif

# if EV_STAT_ENABLE
    void ev_stat_start     (EV_P_ ev_stat *w);
    void ev_stat_stop      (EV_P_ ev_stat *w);
    void ev_stat_stat      (EV_P_ ev_stat *w);
# endif

# if EV_IDLE_ENABLE
    void ev_idle_start     (EV_P_ ev_idle *w);
    void ev_idle_stop      (EV_P_ ev_idle *w);
# endif

#if EV_PREPARE_ENABLE
    void ev_prepare_start  (EV_P_ ev_prepare *w);
    void ev_prepare_stop   (EV_P_ ev_prepare *w);
#endif

#if EV_CHECK_ENABLE
    void ev_check_start    (EV_P_ ev_check *w);
    void ev_check_stop     (EV_P_ ev_check *w);
#endif

# if EV_FORK_ENABLE
    void ev_fork_start     (EV_P_ ev_fork *w);
    void ev_fork_stop      (EV_P_ ev_fork *w);
# endif

# if EV_CLEANUP_ENABLE
    void ev_cleanup_start  (EV_P_ ev_cleanup *w);
    void ev_cleanup_stop   (EV_P_ ev_cleanup *w);
# endif

# if EV_EMBED_ENABLE
    /* only supported when loop to be embedded is in fact embeddable */
    void ev_embed_start    (EV_P_ ev_embed *w);
    void ev_embed_stop     (EV_P_ ev_embed *w);
    void ev_embed_sweep    (EV_P_ ev_embed *w);
# endif

# if EV_ASYNC_ENABLE
    void ev_async_start    (EV_P_ ev_async *w);
    void ev_async_stop     (EV_P_ ev_async *w);
    void ev_async_send     (EV_P_ ev_async *w);
# endif

#if EV_COMPAT3
#define EVLOOP_NONBLOCK EVRUN_NOWAIT
#define EVLOOP_ONESHOT  EVRUN_ONCE
#define EVUNLOOP_CANCEL EVBREAK_CANCEL
#define EVUNLOOP_ONE    EVBREAK_ONE
#define EVUNLOOP_ALL    EVBREAK_ALL
#if EV_PROTOTYPES
    EV_INLINE void ev_loop   (EV_P_ int flags)
    {
        ev_run   (EV_A_ flags);
    }
    EV_INLINE void ev_unloop (EV_P_ int how  )
    {
        ev_break (EV_A_ how  );
    }
    EV_INLINE void ev_default_destroy (void)
    {
        ev_loop_destroy (EV_DEFAULT);
    }
    EV_INLINE void ev_default_fork    (void)
    {
        ev_loop_fork    (EV_DEFAULT);
    }
#if EV_FEATURE_API
    EV_INLINE unsigned int ev_loop_count  (EV_P)
    {
        return ev_iteration  (EV_A);
    }
    EV_INLINE unsigned int ev_loop_depth  (EV_P)
    {
        return ev_depth      (EV_A);
    }
    EV_INLINE void         ev_loop_verify (EV_P)
    {
        ev_verify     (EV_A);
    }
#endif
#endif
#else
    typedef struct ev_loop ev_loop;
#endif

#endif

    EV_CPP(
})

#endif

